On this page you will find a unique type of puzzle. The sudoku you need to solve is made up of all center
boxes of these sudokus, in the formation you see in this picture. As a reminder, they are highlighted with a light
blue color. As you can see, this Sudoku is completely clueless.

To get aquainted with this format, check the Clueless Guide, which
has a few solving tips and an easy starter puzzle. If you have trouble handling this puzzle format, you can download
the Clueless Helper, a program that can open these puzzles directly from this website.
To check your results, go to the list of submissions.

This is Clueless Special 75 for Saturday August 11, 2007, rated Very Hard